// Using Hashtable() Constructor
import java.io.*;
import java.util.*;

class AddElementsToHashtable 
{
    public static void main(String args[])
    {
        // No need to mention the
        // Generic type twice
        Hashtable<String, String> ht1 = new Hashtable<>();

        // Initialization of a Hashtable
        // using Generics
        Hashtable<Integer, String> ht2
            = new Hashtable<Integer, String>();

        // Inserting the Elements
        // using put() method
        ht1.put("192.168.1.20", "one");
        ht1.put("192.16.1.1", "two");
        ht1.put("10.1.2.1", "three");

        ht2.put(4, "four");
        ht2.put(5, "five");
        ht2.put(6, "six");

        // Print mappings to the console
        System.out.println("Mappings of ht1 : " + ht1);
        System.out.println("Mappings of ht2 : " + ht2);
    }
}